Running faster is not about increasing your stride rate but increasing the force in your take off. That is according to research done as to why Jamaican runner, Usain Bolt is the fastest runner in the world.
When Bolt established the current 100-meter world record in the 2009 world championships, running it in 9.58 seconds, he did so by moving his legs at virtually the same pace as his competitors. In fact, if you or I were to compete against Bolt, our legs would turn over at essentially the same rate as his.
This is a theory put forth by academics and track coaches alike who contend that running fast has more to do with the force one applies to the ground than how quickly one can move one’s legs.
Source : The Post Game